Product classification
HS code for Stainless steel tubing: 7306.21
Steel, stainless, casing and tubing of a kind used in drilling for oil and gas, n.e.c. in chapter 73, welded, (not seamless).
Classification of stainless steel tubing under HS 7306.21
Stainless steel tubing for oil and gas applications is classified under HS code 7306.21. This code is specific to casing and tubing of a kind used in drilling for oil or gas, which are welded and made of stainless steel. Unlike Chapter 72, which covers the raw material and semi-finished steel, Chapter 73 covers \"Articles of iron or steel.\" Heading 7306 is for other tubes and pipes that are welded, riveted, or similarly closed. The subheading 7306.21 is highly specific, targeting the energy sector's requirements for corrosion-resistant alloys in downhole environments. These tubes must meet specific industry standards, such as those set by the American Petroleum Institute (API), for pressure and chemical resistance. The classification depends on the manufacturing method (welded) and the intended application (oil/gas drilling). The use of stainless steel in these applications is critical due to the presence of hydrogen sulfide and carbon dioxide in oil wells, which would rapidly corrode standard carbon steel tubing. The welding process used for these tubes is typically electric resistance welding (ERW) or laser welding, ensuring a high-strength longitudinal seam that can withstand extreme subterranean pressures.
- Covers
- Welded stainless steel oil well casing
- Stainless steel production tubing for gas wells
- Welded stainless steel drill pipe
- Corrosion-resistant welded tubing for offshore drilling
- API-standard welded stainless steel casing
- Also under 7306.21
- Tenaris stainless OCTG (welded)
- Vallourec stainless casing (welded)
- Sumitomo Metal stainless tubing
- JFE Steel stainless well pipes
- Sandvik corrosion-resistant tubing
Codes often confused with 7306.21
Common mistake. This product is often misclassified under 7304.22, which is the code for seamless stainless steel casing and tubing. The distinction between welded (7306) and seamless (7304) is a fundamental division in the HS nomenclature. It may also be confused with 7306.40, which covers other welded tubes of circular cross-section of stainless steel not intended for oil and gas drilling.
Top exporters and importers of HS 730621 (the code used for stainless steel tubing), 2025
In 2025, the largest exporter of HS 730621 (the code used for stainless steel tubing) in UN Comtrade data was Malaysia, with 16% of world exports; the largest importer in UN Comtrade data was India, with 21% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Figures cover everything classified under HS 730621, not only stainless steel tubing.
Top exporters 2025 · share of world exports
- 1 Malaysia $3.7M 16% of world exports
- 2 China $3.6M 15% of world exports
- 3 France $3.0M 12% of world exports
World total: $24M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 India $9.4M 21% of world imports
- 2 Philippines $4.7M 10% of world imports
- 3 Spain $4.4M 9.7% of world imports
World total: $46M Reported figures on UN Comtrade ↗
How these figures are built
109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries that did not report are estimated from what other countries recorded trading with them. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).
Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.
Brazil NCM code for stainless steel tubing
Brazil classifies stainless steel tubing under NCM 7306.21.00: HS 7306.21 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
EU Regulatory Requirements
This product falls under the Carbon Border Adjustment Mechanism (CBAM). Importers to the EU must declare embedded carbon emissions and purchase CBAM certificates.
Questions about stainless steel tubing
What is the HS code for Stainless steel tubing?
The HS code for Stainless steel tubing is 730621 (Steel, stainless; casing and tubing of a kind used in drilling for oil and gas, n.e.c. in chapter 73, welded, (not seamless)). For welded stainless steel casing and tubing used in oil and gas drilling, the HS code is 7306.21.
How do I classify Stainless steel tubing for customs?
Stainless steel tubing is classified under HS code 730621 — Steel, stainless; casing and tubing of a kind used in drilling for oil and gas, n.e.c. in chapter 73, welded, (not seamless). This is a 6-digit subheading level code.
Does this code include seamless tubing?
No, seamless stainless steel tubing for oil and gas drilling is classified under HS code 7304.22.
Which countries are the top exporters of stainless steel tubing (HS 730621)?
In 2025, the top exporters of HS 730621 (the code used for stainless steel tubing) in UN Comtrade data were Malaysia ($3.7M, 16% of world exports), China ($3.6M) and France ($3.0M). World exports came to about $24M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Which countries are the top importers of stainless steel tubing (HS 730621)?
In 2025, the top importers of HS 730621 (the code used for stainless steel tubing) in UN Comtrade data were India ($9.4M, 21% of world imports), the Philippines ($4.7M) and Spain ($4.4M). World imports came to about $46M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Is the HS code for Stainless steel tubing the same in all countries?
The base HS code 730621 for Stainless steel tubing is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.
What is the NCM code for stainless steel tubing in Brazil?
In Brazil, stainless steel tubing (HS 730621) is classified under NCM 7306.21.00.